Jacob david



(No Mode l.)

J. DAVID.

AUTOMATIG GAR BRAKE. No. 279,136. Patented June 12,1883.

UNITED STATES PATENT OFFICE.

JACOB DAVID, OF BROOKLYN, NEW YORK, ASSIG'NOR OF ONE-HALF TO ED\VARDAQDEVEAU, OF SAME PLACE.

AUTOMATIC SPECIFICATION forming part of Letters Patent No. 279,136,dated June 12, 1883,

Application filed October 24, 1882. (No model.)

.an obstruction of any kind-on the railroadtrack the obstacle will bepushed away from the wheels of the ear and instantly and automaticallyarrest the progress of the car, and also, by the addition of a leverattached to the car and to the said auxiliary brake, to enable thebrakeman or driver to bring the car to a standstill instantaneously atany desired place.- li attain these objects by the mechanism illustratedin the accompanying drawings, in which- Figure 1 is a side elevation,-showing a section of a car with my automatic brake attached thereto.Fig. 2 is a' plan view of the under side of a car, showing the automaticbrake in place.

Similar letters refer to similar parts in the two figures.

A is a section of a car. h.

B B are the car-wheels.

G is the shoe of the common or ordinary carbrake as at present in use.

D D" are the shoes of my automatic carbrake, which'are formed of a stripof iron or steel, pivoted at one end to a connectionrod, E E", on eachside of the car. One of these brake-shoes, D, is placed in front of oneof the front car-wheels over one of the rails of the track, and theother brake-shoe, D is placed in front of the other front car-wheel onthe other side of the car and over the other rail of the track. Thesebrake-shoes D D are about the "same in width as the width of the face ofthecar-wheels. One end of the rod E E is pivoted to the brakeshoes D Dand the other end of said rod is carried over the brake-shoes O 0,through the slot I, across the width of the car, the center ormiddleportion of said rod being connected to the yoke N or said rod may 'bepivoted to the car at any other convenient point, provided saidbrakeshoes have sufficient play to enable them to reach to within threeor four inches of the rails of the track. The free ends of thebrakeshoes D D are held off and away from the track by the chain S,which has one end attached to the bar F at its center, and the other endof said chain is attached to the bar Q, which latter bar connects thebrake-shoes O C.

, G is a spiral spring, one end of which is connected to the yoke N andthe other end is connected to the under side of the platform of the car.This spring G- is only of sufficient strength and tension to keep thebrake-shoes I) D' from under the wheels in the position shown in Fig. 1.

M is a bar extending across the entire width of the car at the extremeend, and is connected to the car by a pivoted rod, L, on each underneaththeframe of the car, near the end,

and just back of the bar M, and against which the bar M will strike whenit comes in contact with any obstruction.

O is a lever pivoted at its lower end to the bar M, and pivoted at itsmiddle portion at the point marked 1% at the front end of thecar-platform, as shown in Fig. 1.

F is a horizontal bar which extends entirely across the front of thecar, and serves as a sup port and connection for the brake-shoes l) D-.

H is the rod which supports the brake-shoes C G and holds them in placein front of the wheels of the ear.

The different parts having been constructed and connected together andattached to the front or either or both ends of the car, the manner ofoperation is as follows: hen the car is in motion, any obstruction whichis small enough to pass underneath the steps of the car is struck by thebar F, which is con nected at each end to the brake-shoes D D, or isstruck by the rod E E. In either event the brake-shoes D D are drivenagainst the wheels and between the wheels and the rails of the track,and the ear-wheels are thereby amiss caused to runup and upon thebrake-shoesD D in the position shown by the dotted lines in Fig. 1. Thewheels then cease to revolv and the dez'id-weight of the ear causing anim mense friction between the under sides of the brake-shoes D D and theface of the rails, the car is instantaneously stopped. \Vhen any largeobstruetionas, for instance, a horsesuddenly falls in front of the carwhile the latter is 'in motion, such obstruction will strike against thebar M, which bar, being connected by the pivoted rod K to the yoke N,and the W yoke N being connected to the rod E 1 1' and crations.

the brake-shoes l) 1) causes said brake-shoes D l) to be driven backagainst and between.

the wheels and the rails, as shown by the dotted .lines in Fig 1,causing the same cessation of the revolutioiro't' the wheels, and theconsequent friction between the brake-shoes D D and the rails, and theinstantaneous stoppage ol' the motion of the car, as before stated, andthe rigid braces P I. prevent the bar M from being pushed back fartherthan said braces, as is shown by the dotted lines in Fig. 1. Theseactions just described are automatic, and are entirely independent ofthe brakeman or driver; but by the use of the lever 0, here tot'oredescribed, and shown in Fig. 1, attached to the front platform of thecar, the brakenian or driver can, by pushing the end of the lever O awayfrom him, cause and produce the same eit'ect as in. the twopreviously-described op- This lever 0 may be made a jointed lever withtwo t'ulcra, which, when pulled toward the brakeman or driver instead ofbeing pushed from him, will produce the same action of thelnralue-shoesheretofore described. \Vhen from any of the causesheretofore described, the car is stopped with the brakeshoes l) 1)between the wheels and the rails, as shown by the dotted lines in Fig.l, the wedge shape of the ends of said brake-shoes,

' together with the recoil of the car, causes the wheels to back offfrom the shoes, and the spiral spring ("r draws the apparatus back toits original or first position, as shown in Figs. 1 and 2.

It is not my design in the use of the appa purpose of afiording a meansof instantaneously stopping a car when it comes in contact with anobstruction while in motion, whether the other steam, air, or handbrakes are in use or not, and

hat I claim as my invention, and desireto secure by Letters Patent, is

1. The arrangement and combination of the brake'shoes D 1) with. aswinging and connecting rod, E E said connecting-rod having a yoke, N,in the center to which yoke a spring, (1, is attached, as shown, havingan obobstruction-bar F, connected'to the rod at 1C and E, having a yoke,N, on the connection rod E, with the tension-spring G andsustaining-chain S, as described, in combination with a hand-lever, O,with a connecting-rod, K, for the purpose shown and described.

3. A car-ln-ake composed ofthe brakeshoes I) D", jointed to theconnectingrod E 11 and the obstruction-bar F, having ayoke, N, on

the connecting-rod E, with a sustainingchain, S, and tensions nring G,as described, in combination with a front obstruction s bar, M, placedon the extreme front end and across the front of the car, and connectedto the car by the swinging rods L, and connected to the yoke by thejointed bar K, having the rigid braces or stops I l, for the purpose asshown and described. 7

4. A car-brake having the obstruction-bar M, connected to thebrake-shoes D D ly the bar K, and connection-rod E E having a yoke, N,with a tension-spring, G, and a sustaining chain,S, all arranged inthemanner described, in combination with a hand-lever, O, for the purposeas shown and described.

JACOB DAVID. W'itnesses:

XV. C. \VREN, A. M. PIERCE.

-struction-lmr, F, connecting at one end to the

